痾
以下是一題期中考考古= =
Which of the following is ""NOT"" part of an older tree's bark?
(A)cork
(B)cork cambium
(C)lenticels
(D)secondary xylem
(E)secondary phloem
為甚麼答案是E不是D...
還是答案錯了.... 囧
bark的意思不就是維管束形成層以外的所有部位嗎...
xylem不是總是在維管束形成層以內?不會吧 = =....
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